#pragma once

#include <iostream>
#include <string>
#include <cstring>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include "protocol.hpp"

#define NUM 1024

class CalClient
{
public:
    CalClient(const std::string &serverip, const uint16_t &serverport)
        : _sock(-1), _serverip(serverip), _serverport(serverport)
    {
    }
    void initClient()
    {
        // 1. 创建socket
        _sock = socket(AF_INET, SOCK_STREAM, 0);
        if (_sock < 0)
        {
            std::cerr << "socket create error" << std::endl;
            exit(2);
        }
        // 2. tcp的客户端要不要bind？要的！ 要不要显示的bind？不要！这里尤其是client port要让OS自定随机指定！
        // 3. 要不要listen？不要！
        // 4. 要不要accept? 不要！
        // 5. 要什么呢？？要发起链接！
    }
    void start()
    {
        struct sockaddr_in server;
        memset(&server, 0, sizeof(server));
        server.sin_family = AF_INET;
        server.sin_port = htons(_serverport);
        server.sin_addr.s_addr = inet_addr(_serverip.c_str());

        if (connect(_sock, (struct sockaddr *)&server, sizeof(server)) != 0)
        {
            std::cerr << "socket connect error" << std::endl;
        }
        else
        {
            std::string line;
            std::string inbuffer;
            while (true)
            {
                std::cout << "mycal>>> ";
                std::getline(std::cin, line);  // 1+1
                Request req = ParseLine(line); // "1+1"
                std::string content;
                req.serialize(&content);
                std::string send_string = enLength(content);
                std::cout << "sendstring:\n" << send_string << std::endl;
                send(_sock, send_string.c_str(), send_string.size(), 0); // bug?? 不管

                std::string package, text;
                //  "content_len"\r\n"exitcode result"\r\n
                if (!recvPackage(_sock, inbuffer, &package))
                    continue;
                if (!deLength(package, &text))
                    continue;
                // "exitcode result"
                Response resp;
                resp.deserialize(text);
                std::cout << "exitCode: " << resp.exitcode << std::endl;
                std::cout << "result: " << resp.result << std::endl;
            }
        }
    }
    Request ParseLine(const std::string &line)
    {
        // 建议版本的状态机！
        //"1+1" "123*456" "12/0"
        int status = 0; // 0:操作符之前，1:碰到了操作符 2:操作符之后
        int i = 0;
        int cnt = line.size();
        std::string left, right;
        char op;
        while (i < cnt)
        {
            switch (status)
            {
            case 0:
            {
                if(!isdigit(line[i]))
                {
                    op = line[i];
                    status = 1;
                }
                else left.push_back(line[i++]);
            }
            break;
            case 1:
                i++;
                status = 2;
                break;
            case 2:
                right.push_back(line[i++]);
                break;
            }
        }
        std::cout << std::stoi(left)<<" " << std::stoi(right) << " " << op << std::endl;
        return Request(std::stoi(left), std::stoi(right), op);
    }
    ~CalClient()
    {
        if (_sock >= 0)
            close(_sock);
    }

private:
    int _sock;
    std::string _serverip;
    uint16_t _serverport;
};